OVA
Description
Mikimaru Shimura is a male character with brown hair and a notably cute, boyish appearance. His short stature frequently causes him to be mistaken for a middle school student, a perception that annoys him. He possesses a fundamentally sunny, cheerful, and optimistic temperament, serving as a peacemaker within his group due to his strong aversion to conflict among those he cares about. Despite this generally bright demeanor, he is highly sentimental and prone to emotional reactions over minor incidents.

His personality combines perceptiveness about interpersonal relationships and emotional states—enabling him to detect tensions among friends without being told—with occasional silliness that results in him being labeled, alongside his roommate Yuusuke, as part of an "idiot duo." He is not academically inclined but demonstrates emotional intelligence, particularly in mediating or fostering connections, such as persistently trying to include the withdrawn Nakamoto in group activities. He maintains a close, amicable living relationship with Yuusuke, who occasionally seeks his advice, though they argue openly in class.

A defining aspect is his intense romantic fixation on Arai, whom he openly calls "my Arai-kun." This obsession manifests as jealousy when others capture Arai's attention, though his reactions fluctuate with his mood. His crush leads him to request favors like a kiss to keep a secret about Kawazoe, and he expresses a desire for Arai to be his first kiss. His friends accept his exclusive interest in males as normal behavior. While not feminine, he is consistently described as "cute," contributing to social acceptance. Arai responds with occasional teasing, calling him a kid despite Mikimaru being older, but also exhibits protective, almost brotherly fondness.

His background reveals a semi-complicated family situation: he is adopted, with his biological mother being a famous actress who relinquished him to avoid scandal. His adoptive family and close circle know this heritage, and he treasures a locket containing his birth mother's picture, showing forgiveness. His adoptive father's identity remains undisclosed.

In media beyond the core narrative, he appears in the OVA "Sotsugyou M" playing the related video game and displaying an insatiable appetite. He also features in the OVA "Marriage: Kekkon" as part of the cast. His interests include video games and gambling intelligence gathering. He plays piano skillfully in novels, assisting with band arrangements, but in manga references, he plays support guitar with negligible proficiency.